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    ccccccccccc
    <span>
        asdasdasdasdddddddasdasddasd
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        h2>span {
	vertical-align: middle;
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    <h2>houdunren.com <span>hdcms</span></h2>    
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    .s2{
        letter-spacing: 10px;
        word-spacing: 50px;
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ssssssssssssssssssssss asdasd
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    .ve{
        writing-mode: vertical-rl;
    }
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<span class="ve">
    W3C 标准中有如下规定：

    When there is only one single-line text input field in a form, the user agent should accept Enter in that field as a request to submit the form.

即：当一个 form 元素中只有一个输入框时，在该输入框中按下回车应提交该表单。如果希望阻止这一默认行为，可以在 <el-form> 标签上添加 @submit.native.prevent。
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